首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Single-parent Kids Do Best Single mums are better at raising their kids than two parents—at least in the bird world. Mother
Single-parent Kids Do Best Single mums are better at raising their kids than two parents—at least in the bird world. Mother
admin
2014-08-13
69
问题
Single-parent Kids Do Best
Single mums are better at raising their kids than two parents—at least in the bird world. Mother zebra finches have to work harder and raise fewer chicks on their own, but they also produce more attractive sons who are more likely to get a mate.
The finding shows that family conflict is as important an evolutionary driving force as ecological factors such as hunting and food supply.【B1】______
In evolutionary terms, the best strategy for any parent in the animal world is to find someone else to care for their offspring, so they can concentrate on breeding again. So it’ s normal for parents to try to pass the buck to each other. But Ian Hartley from the University of Lancaster and his team wondered how families solve this conflict, and how the conflict itself affects the offspring.
【B2】______They compared single females with pairs, by monitoring the amount of food each parent collected, and removing or adding chicks so that each pair of birds was raising four chicks, and each single mum had two—supposedly the same amount of work.
But single mums, they found, put in about 25 percent more effort than females rearing with their mate. 【B3】______"The offspring suffer some of the cost of this conflict," says Hartley.
The cost does not show in any obvious decrease in size or weight, but in how attractive they are to the opposite sex. When the chicks were mature, the researchers tested the "fitness" of the male offspring by offering females their choice of partner.【B4】______
Sexual conflict has long been thought to affect the quality of care given to offspring, says zoologist Rebecca Kilner at Cambridge University, who works on conflict of parents in birds. "But the experimental evidence is not great. The breakthrough here is showing it empirically".
More surprising, says Kilner, is Hartley’ s statement that conflict may be a strong influence on the evolution of behaviour, clutch size and even appearance. "People have not really made that link," says Hartley. A female’s reproductive strategy is usually thought to be affected by hunting and food supply. 【B5】______
A. To avoid being exploited, mothers with a partner hold back from working too hard if the father is being lazy, and it’ s the chicks that pay the price.
B. To find out, they measured how much effort zebra finch parents put into raising their babies.
C. Those males reared by single mums were chosen more often than those from two-parent families.
D. With two parents around, there’ s always a conflict of interests, which can have a detrimental effect on the quality of the offspring.
E. Kilner says conflict of parents should now be taken into account as well.
F. It turned out that single mums had greater influence on their offspring.
【B2】
选项
答案
B
解析
前一段的最后一句说Ian Hartley教授及其团队对家庭成员如何解决冲突和这种冲突对后代的影响产生兴趣,空后的内容又为他们对鸟类进行研究的具体方法和过程。故本题应选B。
转载请注明原文地址:https://kaotiyun.com/show/0Pmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Readthefollowingarticleandanswerquestions9-18onthenextpage.TheNewColourofBritishArmy1Itt
Readthefollowingarticleandanswerquestions9-18onthenextpage.TheNewColourofBritishArmy1Itt
Youwillhearfivepeoplegivingreasonswhychildrenlearntheirmothertonguesowell.Beforeyoulisten,readthelistof
Lookatthequestionsforthispart.Youwillhearapassageabout"HealthandFitness".Youwilllistentoittwice.F
Lookatthequestionsforthispart.Youwillhearapassageabout"HealthandFitness".Youwilllistentoittwice.F
Lookatthequestionsforthispart.Youwillhearapassageabout"HealthandFitness".Youwilllistentoittwice.F
Youwillhearthecustomsinfivecountries.Forquestions9-13,choosefromthelistA~Fthepropercountries.Usethe
Lookatthequestionsforthispart.Youwillhearapassageabout"ALittleHouseintheBigWoods".Youwilllistentoit
Lookatthequestionsforthispart.Youwillhearapassageabout"ALittleHouseintheBigWoods".Youwilllistentoit
Lookatthequestionsforthispart.Youwillhearapassageabout"ChangesintheRankingsofBritishUniversities".F
随机试题
正常情况下胸部MRI不能显示的结构是
按照管理跨度的大小设管理层的多少,可形成两种组织结构,____________和锥形式组织结构。
在Windows中查看到的硬盘容量与厂家标注的容量相比,前者_______后者。
[*].且当x→1时,x一1→0,故必须有[*](x2+ax+b)=0,即a+b+1=0.将b=一a一1代入,有[*]=a+2,所以a=3,b=一4.
甲状腺功能亢进的特殊检查方法有
外商在我国投资的企业,被称为“三资企业”,即()。
施工总承包管理方对所承包的建设工程承担施工任务组织的总的责任,它的主要特征有( )。
英译汉:“consignor;consignee”,正确的翻译为( )。
脉管系统是由()组成的。
2010年1--3月,我国鲜苹果出口总量为31.2万吨,与上年同期相比下降11%;总出口额为2.1亿美元,增加4%;平均单价为679美元/吨,上升17%。2010年1--3月,我国鲜苹果对俄罗斯的出口量为5.71万吨,同比减少13%,出口额为3693万美
最新回复
(
0
)